feat: add comprehensive Windows/WSL support and documentation

Major improvements for Windows users:
- Add detailed Windows Setup Guide with native and WSL options
- Create platform-specific example configurations (Windows/WSL/macOS)
- Add troubleshooting section addressing common Windows/WSL errors
- Create test_wsl_setup.bat diagnostic script for Windows users

Script improvements:
- Enhance run_gemini.bat with error handling and helpful messages
- Update both run scripts to use server.py as main entry point
- Keep gemini_server.py as backward compatibility wrapper

Documentation:
- Add clear instructions for both native Windows and WSL setups
- Explain the wsl.exe bridge approach for WSL users
- Include performance recommendations for WSL file access
- Add specific troubleshooting for spawn ENOENT errors

All tests passing, code properly formatted and linted.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

examples/claude_config_macos.json

@@ -0,0 +1,10 @@
+{
+  "mcpServers": {
+    "gemini": {
+      "command": "/Users/YOUR_USERNAME/gemini-mcp-server/run_gemini.sh",
+      "env": {
+        "GEMINI_API_KEY": "your-gemini-api-key-here"
+      }
+    }
+  }
+}

examples/claude_config_windows.json

@@ -0,0 +1,10 @@
+{
+  "mcpServers": {
+    "gemini": {
+      "command": "C:\\Users\\YOUR_USERNAME\\gemini-mcp-server\\run_gemini.bat",
+      "env": {
+        "GEMINI_API_KEY": "your-gemini-api-key-here"
+      }
+    }
+  }
+}

examples/claude_config_wsl.json

@@ -0,0 +1,11 @@
+{
+  "mcpServers": {
+    "gemini": {
+      "command": "wsl.exe",
+      "args": ["/home/YOUR_WSL_USERNAME/gemini-mcp-server/run_gemini.sh"],
+      "env": {
+        "GEMINI_API_KEY": "your-gemini-api-key-here"
+      }
+    }
+  }
+}